Abrasive flow machining is a new type of automated finishing technology, which is achieved by soft abrasive media under pressure reciprocating flow through the parts being processed surface and finishing, can process the parts with complex internal cavities, and has the advantages of good uniformity and repeatability, automated production can be achieved, high productivity, controllability and predictability, and good quality of the processed surface, and so on. The principle of abrasive flow machining is to remove metal through the grinding action of abrasive media on the surface of the workpiece to improve the surface finish of the part. Abrasive flow processing of abrasive flow grinding media for low viscosity, elastic fluid, containing hard particles and organic additives, process removal speed depends on the abrasive grinding paste media flow rate, particle size, concentration and particle density and hardness. Abrasive flow machining is suitable for workpieces with small holes, internal and external gears and irregular holes, and is particularly excellent in the aerospace industry and in the surface treatment of materials after electrolytic machining.